EP1493788B1 - Matériau ablatable à base de silicone-liège - Google Patents

Matériau ablatable à base de silicone-liège Download PDF

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Publication number
EP1493788B1
EP1493788B1 EP20040253679 EP04253679A EP1493788B1 EP 1493788 B1 EP1493788 B1 EP 1493788B1 EP 20040253679 EP20040253679 EP 20040253679 EP 04253679 A EP04253679 A EP 04253679A EP 1493788 B1 EP1493788 B1 EP 1493788B1
Authority
EP
European Patent Office
Prior art keywords
silicone
cork
present
ablative
catalyst
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20040253679
Other languages
German (de)
English (en)
Other versions
EP1493788A1 (fr
Inventor
Steven A. Cosby
Matthew Kelly
Beth Van Waveren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of EP1493788A1 publication Critical patent/EP1493788A1/fr
Application granted granted Critical
Publication of EP1493788B1 publication Critical patent/EP1493788B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
    • B64G1/00—Cosmonautic vehicles
    • B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
    • B64G1/52—Protection, safety or emergency devices; Survival aids
    • B64G1/58—Thermal protection, e.g. heat shields
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Definitions

  • the present invention pertains to a synthetic coating composition, and more particularly to a silicone-cork ablative material.
  • Ablative materials are used as heat shields to protect space vehicles as they are subjected to high velocity, high temperature conditions during launch and during re-entry to the earth's atmosphere. Such materials need to exhibit good adhesion to the substrate, be flexible enough to provide thermal strain stability, have good thermal stability, and have low thermal conductivity.
  • Ablative materials in current use may be roughly categorized as either solid materials or cured-in-place coating compositions.
  • Cured-in-place ablative coating compositions may be either low viscosity compositions for a spray application or high viscosity compositions for hand trowel application.
  • Solid coverings e.g. cork sheet or ceramic blocks
  • Fabrication of a smooth covering from solid ablative materials and removal of the charred covering from the spacecraft after re-entry are difficult, time consuming, and expensive processes.
  • U.S. Patent No. 4,837,250 to Headrick et al. illustrates a trowelable ablative coating composition.
  • the composition comprises an epoxy resin, an amide curing agent, glass microspheres, and ground cork.
  • thermo protection system material that meets the thermal requirements for aerospace launch vehicles and carriers.
  • a material for use in a thermal protection system contains a silicone resin binder, a silicone catalyst, ground cork, glass ecospheres, and a silicone solvent.
  • the invention also provides a surface to be subjected to a high temperature environment, which surface has a sprayed coating said coating containing a silicone resin, a silicone catalyst, ground cork, glass ecospheres, and a silicone solvent.
  • a silicone-cork ablative material which meets the thermal requirements for aerospace launch vehicles and carriers.
  • the silicone-cork ablative material of the present invention may be applied to any surface to be exposed to a high temperature environment and which requires thermal protection.
  • a silicone-cork ablative material in accordance with the present invention broadly contains a silicone resin binder, preferably a high temperature silicone resin binder such as Dow Corning Sylgard 184 resin, a silicone catalyst, such as Down Coming Sylgard 184 curing catalyst, a ground cork for providing ablative properties, glass ecospheres for providing high temperature capabilities such as Emersion Cummins IG-201 or SI glass ecospheres and a silicone solvent such as Dow Corning OS-10.
  • a silicone resin binder preferably a high temperature silicone resin binder such as Dow Corning Sylgard 184 resin
  • a silicone catalyst such as Down Coming Sylgard 184 curing catalyst
  • a ground cork for providing ablative properties
  • glass ecospheres for providing high temperature capabilities
  • Emersion Cummins IG-201 or SI glass ecospheres such as Emersion Cummins IG-201 or SI glass ecospheres
  • a silicone solvent such as Dow Corning OS-10.
  • the silicone-cork ablative materials consists of from 65.3 wt% to 72.3 wt% silicone resin, from 6.5 wt% to 7.25 wt% silicone catalyst, from 7.22 wt% to 7.98 wt% ground cork, from 8.36 wt% to 9.24 wt% glass ecospheres, and the balance silicone solvent, most preferably from 7.6 wt% to 8.40 wt% silicone solvent.
  • the silicone cork ablative material may be applied using the CSTTM spray system such as that shown in U.S. Patent No. 5,307,992, which is incorporated by reference herein.
  • the CSTTM spray system can be best understood in terms of its two main component delivery systems, i.e. the liquid (resin and catalyst) delivery system and the solids (cork and glass) delivery system.
  • the liquid portion is a high temperature silicone encapsulate that is comprised of two part resin/catalyst.
  • the resin and catalyst are delivered from their pressure pots to the spray gun using metering pumps.
  • the metering pumps with their associated controls, allow the accurate flow of resin and catalyst to produce the desired Silicone-Cork density.
  • the solids delivery system is comprised of loss-in-weight type feeder systems that control the cork and glass ecosphere flow rates. Both of these solids are delivered to the spray gun using an eductor-based pneumatic delivery system. The cork and glass ecospheres are premixed in the cyclonic mixer prior to delivery to the spray gun.
  • the silicone-cork ablative material may be applied to a surface to be protected using a spray process such as a convergent spray technology process using the nozzle shown in U.S. Patent No. 6,322,000, which is also hereby incorporated by reference.
  • a spray process such as a convergent spray technology process using the nozzle shown in U.S. Patent No. 6,322,000, which is also hereby incorporated by reference.
  • a robot and turn table are used to achieve the desired Silicone Cork ablative thickness, overlap pattern, and the gun stand-off distances for each type structure.
  • These basic components of the CSTTM spray system would remain the same for almost any CSTTM application, although the performance requirements of the system can be greatly simplified depending upon the geometry of the part to be sprayed, and the required accuracy of the sprayed coating properties (e.g. density, thickness, strength).
  • the ability to spray the silicone-cork ablative material of the present invention allows for high build-up materials with reduced solvents and tailored application to complex surfaces.
  • silicone-cork ablative material of the present invention is capable of meeting extreme temperature conditions (i.e. -32 degrees Centigrade to +260 degrees Centigrade) that can not be met by standard materials.
  • the silicone-cork ablative material of the present invention also acts as an insulator for the protection of equipment. Its ablative properties allow the transfer of heat through the erosion of materials during launch and flight.
  • the silicone-cork ablative material of the present invention has a desirable density in the range of 32 - 42 pounds per cubic foot (512.6 - 672.8 kg m -3 ).
  • silicone-cork ablative material has particular utility on high temperature surfaces of spacecraft, aircraft, rocket boosters, and rocket engines, it may be applied on any surface which need to be protected from exposure to high temperatures.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Critical Care (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Paints Or Removers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Thermal Insulation (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Claims (9)

  1. Matériau assurant la protection thermique d'une surface, ledit matériau contenant une résine de silicone, un catalyseur de silicone, de la farine de liège, des écosphères de verre et un solvant de silicone.
  2. Matériau selon la revendication 1, dans lequel ladite résine de silicone est présente en une quantité allant de 65,3 % en poids à 72,3 % en poids.
  3. Matériau selon la revendication 1 ou 2, dans lequel ledit catalyseur de silicone est présent en une quantité allant de 6,5 % en poids à 7,25 % en poids.
  4. Matériau selon l'une quelconque des revendications précédentes, dans lequel ladite farine de liège est présente en une quantité allant de 7,22 % en poids à 7,98 % en poids.
  5. Matériau selon l'une quelconque des revendications précédentes, dans lequel lesdites écosphères de verre sont présentes en une quantité allant de 8,36 % en poids à 9,24 % en poids.
  6. Matériau ablatif à base de silicone-liège constitué de 65,3 % en poids à 72,3 % en poids de résine de silicone, de 6,5 % en poids à 7,25 % en poids de catalyseur de silicone, de 7,22 % en poids à 7,98 % en poids de farine de liège, de 8,36 % en poids à 9,24 % en poids d'écosphères de verre, le reste étant du solvant de silicone.
  7. Matériau selon la revendication 5 ou 6, dans lequel ledit solvant de silicone est présent en une quantité allant de 7,6 % en poids à 8,40 % en poids.
  8. Surface destinée à être exposée à un environnement à hautes températures, laquelle surface présente un revêtement pulvérisé, ledit revêtement étant un matériau tel que revendiqué dans l'une quelconque des revendications précédentes.
  9. Surface selon la revendication 8, dans laquelle ladite surface est une surface de cellule d'avion.
EP20040253679 2003-06-25 2004-06-18 Matériau ablatable à base de silicone-liège Expired - Lifetime EP1493788B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US607278 2003-06-25
US10/607,278 US6933334B2 (en) 2003-06-25 2003-06-25 Silicone-cork ablative material

Publications (2)

Publication Number Publication Date
EP1493788A1 EP1493788A1 (fr) 2005-01-05
EP1493788B1 true EP1493788B1 (fr) 2007-03-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040253679 Expired - Lifetime EP1493788B1 (fr) 2003-06-25 2004-06-18 Matériau ablatable à base de silicone-liège

Country Status (4)

Country Link
US (1) US6933334B2 (fr)
EP (1) EP1493788B1 (fr)
JP (1) JP2005014900A (fr)
DE (1) DE602004005109T2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7163750B2 (en) * 2003-04-10 2007-01-16 Microphase Coatings, Inc. Thermal barrier composition
US7429626B2 (en) * 2006-02-15 2008-09-30 Pbi Performance Products, Inc. Ablative compounds
US7955996B2 (en) * 2006-08-01 2011-06-07 Rutgers, The State University Of New Jersey Compositions and methods for the protection of substrates from heat flux and fire
US11512208B2 (en) 2006-08-01 2022-11-29 Rutgers, The State University Of New Jersey Compositions and methods for the protection of substrates from heat flux and fire
US8206546B2 (en) * 2008-06-13 2012-06-26 The Boening Company Heat shield having strain compliant matrix and method of forming same
FR2959238B1 (fr) 2010-04-22 2014-03-14 Astrium Sas Materiau de protection thermique
FR2959237B1 (fr) 2010-04-22 2014-03-14 Astrium Sas Materiau de protection thermique
FR2959236B1 (fr) 2010-04-22 2014-01-24 Astrium Sas Materiau de protection thermique optimise
DE102010051752A1 (de) * 2010-11-17 2012-05-24 Diehl Bgt Defence Gmbh & Co. Kg Flugkörper mit einer Außenhülle und einer darauf aufgebrachten Ablationsschicht
JP5878298B2 (ja) * 2011-03-02 2016-03-08 リグナイト株式会社 断熱材用組成物及び断熱材
US20160208828A1 (en) * 2015-01-20 2016-07-21 United Technologies Corporation Thermally resistant article
US10647856B2 (en) * 2016-11-04 2020-05-12 The Boeing Company Mold resistant formable cork
CN109868028B (zh) * 2017-12-01 2021-12-24 辽宁省轻工科学研究院有限公司 一种抗冲刷烧蚀涂料及其制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031059A (en) * 1974-01-21 1977-06-21 Martin Marietta Corporation Low density ablator compositions
US4772495A (en) * 1987-07-23 1988-09-20 United Technologies Corporation Trowelable ablative coating composition and method of use
US4837250A (en) * 1987-07-23 1989-06-06 Usbi Booster Production Company, Inc. Trowelable ablative coating composition and method of use
US5307992A (en) * 1992-11-18 1994-05-03 Usbi Co. Method and system for coating a substrate with a reinforced resin matrix
US6627697B2 (en) * 2001-07-23 2003-09-30 The Boeing Company Low density ablator composition

Also Published As

Publication number Publication date
DE602004005109T2 (de) 2007-11-15
DE602004005109D1 (de) 2007-04-19
JP2005014900A (ja) 2005-01-20
EP1493788A1 (fr) 2005-01-05
US6933334B2 (en) 2005-08-23
US20050096414A1 (en) 2005-05-05

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